> hi Lionel,
>
> On 11/03/2014 22:18, FractRacer wrote:
>> The <-pi,pi> bounds are the values used for the computations. As if you
>> compute the cosinus in the range <-pi,pi> or in the range <-1,1>, it is
>> not a way to scale. Ex, the values for a circle are in the range
>> <0,2pi>, which is like <-pi,pi>.
>
> thanks.  as I said, my maths is .. poor.
>
>>> btw, inside_texture is not available in v3.6.
>> I think Alain make an syntax error, he probably thought:
>> interior_texture{pigment{rgb<1,0,0>}finish{ambient 1}}
>
> ok.
>
>> And why not install PovRay 3.7?
>
> I'm very new to using Povray and v3.6 will be fine for 'learning the ropes'.

You should go straight to version 3.7. That way, you won't need to 
UNlearn some of those "ropes"...



Alain

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